Instructions: TIP STEM ENDS OF BEANS. Bring 4 quarts water to boil and add 1 1/2 tablespoons salt. Cook beans in 2 batches until tender but still a little firm, then lift out. Lay them on a kitchen towel to dry for a minute or so.

Transfer to a bowl. Add oils, shallot, tarragon and walnut pieces. Toss and season to taste with salt and pepper. Add a little vinegar just before serving. Serve warm.

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